Car-wheel



(N80 Model.) 8 Y P.- P. DAVIDSON.

.y CAR WHEEL.

No. 376,865lt y -Patented Jan. 24, 1888.

'w22/7555.55 I .Dui/ifa:

. y /-f'v .ziaz/'zzys UNITED STATES PATENT OFFICE.

FRANCIS P. DAVIDSON, OF SOUTH CHICAGO, ILLINOIS.

CAR-WHEEL..

SPECIFICATION forming part of Letters Patent No. 3763865, dated January24,1888.

f Application filedy February "I, 1887. Serial No. 226,847. (No model.)

To all whom t may concern:

Beit known that I, FRANCIS P. DAVIDSON, acitizen of Great Britain,residing at South Chicago, Cook'county, Illinois, have invented 5certain new and useful Improvements in Car- Wheels, of which thefollowing is a specification.

The object of my invention, is to make pair of car-wheels integral withtheir journals and connecting-shaft; and it consistsl in the l featuresand details of construction hereinafter described and clailned.-

In the drawing I have represented a vertical section of a pair ofcar-wheels with their 15 j ournalsand connecting-shaft cast together.

In the drawing, A represents the wheel, B the shaft, and D the journal.n A

In making my improved car-wheels I cast them, preferably, of steel, andwith the journals, which operate in proper bearings in the truck, andthe shaft, by which they are Connected together, cast integral or solidwith the wheels, and preferably hollow, as shown iu the drawing. In suchcase the tires or surfaces of the wheel intended to come into directContactI with the rails may be cast also integral or sepai rately, asmay be preferred by the manufactu rer. In the drawing I have shown thewheels cast with their tires, journals, andconnecting- 3C shaft allintegral or solid, as above described. In some cases, however,manufacturers may prefer to cast or make the tires in a separate pieceand afterward shrink or otherwise ap'- ply them to the wheels. This is amatter for A thecon'sideration of the manufacturer, and I 35 do nottherefore limit myself absolutely to either the casting of the wheelswith the tires integral therewith or to casting them without the tires;and where the wheels are cast with the tires onthem they may afterward,as. the 4,0'` V surface becomes worn, beturned ortrued into propercondition and a tire Aapplied to them.

I wish to state, further, that in speaking of my invention as applied tocar-wheels I meanl toinclude railway-car wheels,street-carwheels,l 45locomotive-wheels, engine-wheels, truck, and similar wheels, and I usethe word cara in they claims as inclusive and descriptive'of theseyvarious wheels. l y What I regard as new, and deslre to secure 5o YFRANCIS I3. DAVIDSON. y

Witnesses: Y i

THOMAS A. BANNING, E. EHUBBARD.

